| intercollegiate horse show association | 0.54 | 0.8 | 4257 | 38 | 55 |
| intercollegiate horse show association ihsa | 0.77 | 0.8 | 1962 | 43 | 23 |
| interscholastic horse show association | 1.02 | 0.8 | 726 | 38 | 8 |
| inter state horse show association | 1.62 | 0.4 | 8433 | 34 | 91 |
| international horse show association | 0.93 | 0.2 | 4853 | 36 | 94 |
| online horse show association | 1.65 | 0.5 | 8431 | 29 | 77 |
| iowa horse show association | 1.28 | 1 | 1946 | 27 | 80 |
| american horse show association | 0.7 | 0.5 | 7464 | 31 | 85 |
| british show horse association shows | 0.66 | 0.2 | 4316 | 36 | 80 |
| the international horse show | 1.11 | 0.8 | 3304 | 28 | 36 |
| ihsa horse show schedule | 0.98 | 0.3 | 4147 | 24 | 58 |
| idaho state horse show association | 0.32 | 0.9 | 9233 | 34 | 22 |
| iea horse show schedule | 0.55 | 1 | 1058 | 23 | 53 |
| british show horse association | 0.68 | 1 | 801 | 30 | 50 |
| national horse show association | 0.63 | 0.3 | 9229 | 31 | 35 |
| indiana quarter horse association shows | 0.93 | 0.2 | 3016 | 39 | 14 |
| pa horse show association | 1.72 | 0.1 | 7538 | 25 | 36 |
| michigan interscholastic horse association | 1.91 | 0.1 | 9359 | 42 | 29 |
| wisconsin interscholastic horse association | 1.19 | 0.6 | 5132 | 43 | 68 |
| iowa horse shows association facebook | 0.1 | 0.8 | 5248 | 37 | 17 |
| inter county horsemen's association | 1.68 | 0.5 | 9063 | 35 | 17 |
